All commands so far are technically programs on their own.
ls, cat, head, etc
Other programs can also be installed and run from the command line
Package management tools simplify software installation and maintenance
APT (Advanced Package Tool) is a package management system used in Debian-based distributions
sudo apt install firefox
sudo: grants permission to make changes on your computer. Ensures necessary authority to modify system settings and files. Requires your password
What does a certain program do?
unzip - ?
unzip -h
What does a certain program do?
unzip - ?
unzip -h
Use command line option -h
What does a certain program do?
unzip - unpack compressed archived
unzip -h
unzip my_compressed_files.zip -d my_files/